大约有 42,000 项符合查询结果（耗时：0.0493秒） [XML]
ORA-30926: unable to get a stable set of rows in the source tables
...cified in USING clause. This probably means that TABLE_A is a parent table and the same ROWID is returned several times.
You could quickly solve the problem by using a DISTINCT in your query (in fact, if 'Y' is a constant value you don't even need to put it in the query).
Assuming your query is co...
What's the @ in front of a string in C#?
...string verbatim = @"foo\bar";
string regular = "foo\\bar";
Here verbatim and regular have the same contents.
It also allows multi-line contents - which can be very handy for SQL:
string select = @"
SELECT Foo
FROM Bar
WHERE Name='Baz'";
The one bit of escaping which is necessary for verbatim s...
Angular directives - when and how to use compile, controller, pre-link and post-link [closed]
...e any of the following functions to manipulate the DOM behaviour, contents and look of the element on which the directive is declared:
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Difference between mkdir() and mkdirs() in java for java.io.File [closed]
...kdir());
System.out.println(f.mkdirs());
will yield false for the first [and no dir will be created], and true for the second, and you will have created non_existing_dir/someDir
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What is the difference between .cc and .cpp file suffix? [duplicate]
What is the difference between .cc and .cpp file extensions?
4 Answers
4
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Best database field type for a URL
.... The length can be specified as a value from 0 to 255 before MySQL 5.0.3, and 0 to 65,535 in 5.0.3 and later versions. The effective maximum length of a VARCHAR in MySQL 5.0.3 and later is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used.
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Why am I getting a NoClassDefFoundError in Java?
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This is caused when there is a class file that your code depends on and it is present at compile time but not found at runtime. Look for differences in your build time and runtime classpaths.
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Storing images in SQL Server?
I have made a small demo site and on it I am storing images within a image column on the sql server. A few questions I have are...
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Compare two objects and find the differences [duplicate]
what is the best way to compare two objects and find the differences?
2 Answers
2
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Get controller and action name from within controller?
For our web application I need to save the order of the fetched and displayed items depending on the view - or to be precise - the controller and action that generated the view (and the user id of course, but that's not the point here).
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